From: Jeff Moyer <jmoyer@redhat.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
linux-mm@kvack.org, "Alex Deucher" <alexander.deucher@amd.com>,
"Alex Thorlton" <athorlton@sgi.com>,
"Andrea Arcangeli" <aarcange@redhat.com>,
"Andy Lutomirski" <luto@amacapital.net>,
"Benjamin LaHaise" <bcrl@kvack.org>,
"Christian König" <christian.koenig@amd.com>,
"Daniel Vetter" <daniel.vetter@intel.com>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"David Airlie" <airlied@linux.ie>,
"Davidlohr Bueso" <dave@stgolabs.net>,
"David Rientjes" <rientjes@google.com>,
"H . Peter Anvin" <hpa@zytor.com>,
"Hugh Dickins" <hughd@google.com>,
"Ingo Molnar" <mingo@kernel.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
"Konstantin Khlebnikov" <koct9i@gmail.com>,
linux-arch@vger.kernel.org, "Mel Gorman" <mgorman@suse.de>,
"Oleg Nesterov" <oleg@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Petr Cermak" <petrcermak@chromium.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Michal Hocko" <mhocko@suse.com>,
"Alexander Viro" <viro@zeniv.linux.org.uk>
Subject: Re: [PATCH 12/18] aio: make aio_setup_ring killable
Date: Mon, 29 Feb 2016 11:17:31 -0500 [thread overview]
Message-ID: <x491t7vmqxw.fsf@segfault.boston.devel.redhat.com> (raw)
Message-ID: <20160229161731.lBFRnCMv13peQMLjhR8_ZSqVuF00cei-1ii9KYDSCYs@z> (raw)
In-Reply-To: <1456752417-9626-13-git-send-email-mhocko@kernel.org> (Michal Hocko's message of "Mon, 29 Feb 2016 14:26:51 +0100")
Michal Hocko <mhocko@kernel.org> writes:
> From: Michal Hocko <mhocko@suse.com>
>
> aio_setup_ring waits for mmap_sem in writable mode. If the waiting
> task gets killed by the oom killer it would block oom_reaper from
> asynchronous address space reclaim and reduce the chances of timely
> OOM resolving. Wait for the lock in the killable mode and return with
> EINTR if the task got killed while waiting. This will also expedite
> the return to the userspace and do_exit.
>
> Cc: Benjamin LaHaise <bcrl@kvack.org>
> Cc: Alexander Viro <viro@zeniv.linux.org.uk>
> Signed-off-by: Michal Hocko <mhocko@suse.com>
> ---
> fs/aio.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/fs/aio.c b/fs/aio.c
> index 56bcdf4105f4..1c2e7e2c1b2b 100644
> --- a/fs/aio.c
> +++ b/fs/aio.c
> @@ -520,7 +520,12 @@ static int aio_setup_ring(struct kioctx *ctx)
> ctx->mmap_size = nr_pages * PAGE_SIZE;
> pr_debug("attempting mmap of %lu bytes\n", ctx->mmap_size);
>
> - down_write(&mm->mmap_sem);
> + if (down_write_killable(&mm->mmap_sem)) {
> + ctx->mmap_size = 0;
> + aio_free_ring(ctx);
> + return -EINTR;
> + }
> +
> ctx->mmap_base = do_mmap_pgoff(ctx->aio_ring_file, 0, ctx->mmap_size,
> PROT_READ | PROT_WRITE,
> MAP_SHARED, 0, &unused);
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
next prev parent reply other threads:[~2016-02-29 16:17 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-29 13:26 [PATCH 0/18] change mmap_sem taken for write killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 01/18] mm: Make mmap_sem for write waits killable for mm syscalls Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:44 ` kbuild test robot
2016-02-29 13:44 ` kbuild test robot
2016-02-29 13:44 ` kbuild test robot
2016-02-29 13:44 ` kbuild test robot
2016-03-10 15:47 ` Vlastimil Babka
2016-03-10 15:47 ` Vlastimil Babka
2016-03-10 15:56 ` Michal Hocko
2016-03-10 15:56 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 02/18] mm: make vm_mmap killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 9:59 ` Vlastimil Babka
2016-03-11 9:59 ` Vlastimil Babka
2016-03-11 12:12 ` Michal Hocko
2016-03-11 12:12 ` Michal Hocko
2016-03-11 12:43 ` Vlastimil Babka
2016-03-11 12:43 ` Vlastimil Babka
2016-03-11 12:55 ` Michal Hocko
2016-03-11 12:55 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 03/18] mm: make vm_munmap killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 10:06 ` Vlastimil Babka
2016-03-11 10:06 ` Vlastimil Babka
2016-03-11 12:32 ` Michal Hocko
2016-03-11 12:32 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 04/18] mm, aout: handle vm_brk failures Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 10:32 ` Vlastimil Babka
2016-03-11 10:32 ` Vlastimil Babka
2016-03-11 12:42 ` Michal Hocko
2016-03-11 12:42 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 05/18] mm, elf: handle vm_brk error Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 10:35 ` Vlastimil Babka
2016-03-11 10:35 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 06/18] mm: make vm_brk killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 10:44 ` Vlastimil Babka
2016-03-11 10:44 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 07/18] mm, proc: make clear_refs killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:47 ` kbuild test robot
2016-02-29 13:47 ` kbuild test robot
2016-02-29 17:38 ` Oleg Nesterov
2016-02-29 17:38 ` Oleg Nesterov
2016-02-29 17:53 ` Michal Hocko
2016-02-29 17:53 ` Michal Hocko
2016-02-29 17:58 ` Oleg Nesterov
2016-02-29 17:58 ` Oleg Nesterov
2016-02-29 18:02 ` Michal Hocko
2016-02-29 18:02 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 08/18] mm, fork: make dup_mmap wait for mmap_sem for write killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:48 ` kbuild test robot
2016-02-29 13:48 ` kbuild test robot
2016-02-29 17:54 ` Oleg Nesterov
2016-02-29 17:54 ` Oleg Nesterov
2016-02-29 13:26 ` [PATCH 09/18] ipc, shm: make shmem attach/detach wait for mmap_sem killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-08 19:15 ` Davidlohr Bueso
2016-03-08 19:15 ` Davidlohr Bueso
2016-03-09 10:16 ` Michal Hocko
2016-03-09 10:16 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 10/18] vdso: make arch_setup_additional_pages wait for mmap_sem for write killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:45 ` kbuild test robot
2016-02-29 13:45 ` kbuild test robot
2016-02-29 13:50 ` kbuild test robot
2016-02-29 13:50 ` kbuild test robot
2016-02-29 13:53 ` kbuild test robot
2016-02-29 13:53 ` kbuild test robot
2016-02-29 15:41 ` Andy Lutomirski
2016-02-29 15:41 ` Andy Lutomirski
2016-03-11 11:28 ` Vlastimil Babka
2016-03-11 11:28 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 11/18] coredump: make coredump_wait wait for mma_sem " Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 15:57 ` Oleg Nesterov
2016-02-29 15:57 ` Oleg Nesterov
2016-03-11 11:32 ` Vlastimil Babka
2016-03-11 11:32 ` Vlastimil Babka
2016-03-11 11:54 ` Vlastimil Babka
2016-03-11 11:54 ` Vlastimil Babka
2016-03-11 12:46 ` Michal Hocko
2016-03-11 12:46 ` Michal Hocko
2016-02-29 13:26 ` [PATCH 12/18] aio: make aio_setup_ring killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 16:17 ` Jeff Moyer [this message]
2016-02-29 16:17 ` Jeff Moyer
2016-03-11 11:57 ` Vlastimil Babka
2016-03-11 11:57 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 13/18] exec: make exec path waiting for mmap_sem killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 17:23 ` Oleg Nesterov
2016-02-29 17:23 ` Oleg Nesterov
2016-02-29 17:47 ` Michal Hocko
2016-02-29 17:47 ` Michal Hocko
2016-02-29 18:10 ` Oleg Nesterov
2016-02-29 18:10 ` Oleg Nesterov
2016-03-11 12:51 ` Vlastimil Babka
2016-03-11 12:51 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 14/18] prctl: make PR_SET_THP_DISABLE wait " Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 12:54 ` Vlastimil Babka
2016-03-11 12:54 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 15/18] uprobes: wait for mmap_sem for write killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 15:57 ` Oleg Nesterov
2016-02-29 15:57 ` Oleg Nesterov
2016-02-29 16:28 ` Michal Hocko
2016-02-29 16:28 ` Michal Hocko
2016-02-29 17:12 ` Oleg Nesterov
2016-02-29 17:12 ` Oleg Nesterov
2016-02-29 13:26 ` [PATCH 16/18] drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 15:23 ` Vlastimil Babka
2016-03-11 15:23 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 17/18] drm/radeon: make radeon_mn_get " Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-02-29 13:35 ` Christian König
2016-02-29 13:35 ` Christian König
2016-03-11 15:27 ` Vlastimil Babka
2016-03-11 15:27 ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 18/18] drm/amdgpu: make amdgpu_mn_get " Michal Hocko
2016-02-29 13:26 ` Michal Hocko
2016-03-11 15:29 ` Vlastimil Babka
2016-03-11 15:29 ` Vlastimil Babka
2016-02-29 13:31 ` [PATCH 0/18] change mmap_sem taken for write killable Michal Hocko
2016-02-29 13:31 ` Michal Hocko
2016-02-29 14:04 ` Kirill A. Shutemov
2016-02-29 14:04 ` Kirill A. Shutemov
2016-02-29 14:16 ` Michal Hocko
2016-02-29 14:16 ` Michal Hocko
2016-02-29 15:03 ` Kirill A. Shutemov
2016-02-29 15:03 ` Kirill A. Shutemov
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